brcm63xx: allow setting the number of usb host ports for boards

[openwrt.git] / target / linux / brcm63xx / patches-3.10 / 206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch

diff --git a/target/linux/brcm63xx/patches-3.10/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch b/target/linux/brcm63xx/patches-3.10/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch
new file mode 100644 (file)
index 0000000..b6e44a7
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.10/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch
@@ -0,0 +1,65 @@
+From 6ac09efa8f0e189ffe7dd7b0889289de56ee44cc Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jogo@openwrt.org>
+Date: Sun, 19 Jan 2014 12:18:03 +0100
+Subject: [PATCH] USB: EHCI: allow limiting ports for ehci-platform
+
+In the same way as the ohci platform driver allows limiting ports,
+enable the same for ehci. This prevents a mismatch in the available
+ports between ehci/ohci on USB 2.0 controllers.
+
+This is needed if the USB host controller always reports the maximum
+number of ports regardless of the number of available ports (because
+one might be set to be usb device).
+
+Signed-off-by: Jonas Gorski <jogo@openwrt.org>
+---
+ drivers/usb/host/ehci-hcd.c      | 4 ++++
+ drivers/usb/host/ehci-platform.c | 2 ++
+ drivers/usb/host/ehci.h          | 1 +
+ include/linux/usb/ehci_pdriver.h | 1 +
+ 4 files changed, 8 insertions(+)
+
+--- a/drivers/usb/host/ehci-hcd.c
++++ b/drivers/usb/host/ehci-hcd.c
+@@ -661,6 +661,10 @@ int ehci_setup(struct usb_hcd *hcd)
+ 
+       /* cache this readonly data; minimize chip reads */
+       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
++      if (ehci->num_ports) {
++              ehci->hcs_params &= ~0xf; /* bits 3:0, ports on HC */
++              ehci->hcs_params |= ehci->num_ports;
++      }
+ 
+       ehci->sbrn = HCD_USB2;
+ 
+--- a/drivers/usb/host/ehci-platform.c
++++ b/drivers/usb/host/ehci-platform.c
+@@ -48,6 +48,8 @@ static int ehci_platform_reset(struct us
+       ehci->big_endian_desc = pdata->big_endian_desc;
+       ehci->big_endian_mmio = pdata->big_endian_mmio;
+       ehci->ignore_oc = pdata->ignore_oc;
++      if (pdata->num_ports && pdata->num_ports <= 15)
++              ehci->num_ports = pdata->num_ports;
+ 
+       ehci->caps = hcd->regs + pdata->caps_offset;
+       retval = ehci_setup(hcd);
+--- a/drivers/usb/host/ehci.h
++++ b/drivers/usb/host/ehci.h
+@@ -188,6 +188,7 @@ struct ehci_hcd {                  /* one per controlle
+       u32                     command;
+ 
+       /* SILICON QUIRKS */
++      unsigned int            num_ports;
+       unsigned                no_selective_suspend:1;
+       unsigned                has_fsl_port_bug:1; /* FreeScale */
+       unsigned                big_endian_mmio:1;
+--- a/include/linux/usb/ehci_pdriver.h
++++ b/include/linux/usb/ehci_pdriver.h
+@@ -37,6 +37,7 @@
+  */
+ struct usb_ehci_pdata {
+       int             caps_offset;
++      unsigned int    num_ports;
+       unsigned        has_tt:1;
+       unsigned        has_synopsys_hc_bug:1;
+       unsigned        big_endian_desc:1;